diff --git a/effects/backgroundcontrast/contrast.cpp b/effects/backgroundcontrast/contrast.cpp
index 657ea6371c..65528f91f2 100644
--- a/effects/backgroundcontrast/contrast.cpp
+++ b/effects/backgroundcontrast/contrast.cpp
@@ -370,7 +370,7 @@ bool ContrastEffect::shouldContrast(const EffectWindow *w, int mask, const Windo
 
 void ContrastEffect::drawWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
 {
-    const QRect screen = effects->virtualScreenGeometry();
+    const QRect screen = GLRenderTarget::virtualScreenGeometry();
     if (shouldContrast(w, mask, data)) {
         QRegion shape = region & contrastRegion(w).translated(w->pos()) & screen;
 
@@ -397,7 +397,7 @@ void ContrastEffect::drawWindow(EffectWindow *w, int mask, QRegion region, Windo
         }
 
         if (!shape.isEmpty()) {
-            doContrast(shape, screen, data.opacity());
+            doContrast(shape, screen, data.opacity(), data.screenProjectionMatrix());
         }
     }
 
@@ -411,7 +411,7 @@ void ContrastEffect::paintEffectFrame(EffectFrame *frame, QRegion region, double
     effects->paintEffectFrame(frame, region, opacity, frameOpacity);
 }
 
-void ContrastEffect::doContrast(const QRegion& shape, const QRect& screen, const float opacity)
+void ContrastEffect::doContrast(const QRegion& shape, const QRect& screen, const float opacity, const QMatrix4x4 &screenProjection)
 {
     const QRegion actualShape = shape & screen;
     const QRect r = actualShape.boundingRect();
@@ -428,7 +428,8 @@ void ContrastEffect::doContrast(const QRegion& shape, const QRect& screen, const
     scratch.setWrapMode(GL_CLAMP_TO_EDGE);
     scratch.bind();
 
-    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r.x(), effects->virtualScreenSize().height() - r.y() - r.height(),
+    const QRect sg = GLRenderTarget::virtualScreenGeometry();
+    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r.x() - sg.x(), sg.height() - sg.y() - r.y() - r.height(),
                         r.width(), r.height());
 
     // Draw the texture on the offscreen framebuffer object, while blurring it horizontally
@@ -443,6 +444,7 @@ void ContrastEffect::doContrast(const QRegion& shape, const QRect& screen, const
     textureMatrix.scale(1.0 / scratch.width(), -1.0 / scratch.height(), 1);
     textureMatrix.translate(-r.x(), -scratch.height() - r.y(), 0);
     shader->setTextureMatrix(textureMatrix);
+    shader->setModelViewProjectionMatrix(screenProjection);
 
     vbo->draw(GL_TRIANGLES, 0, actualShape.rectCount() * 6);
 
diff --git a/effects/backgroundcontrast/contrast.h b/effects/backgroundcontrast/contrast.h
index 688fe2203d..20bf8bf605 100644
--- a/effects/backgroundcontrast/contrast.h
+++ b/effects/backgroundcontrast/contrast.h
@@ -74,7 +74,7 @@ private:
     QRegion contrastRegion(const EffectWindow *w) const;
     bool shouldContrast(const EffectWindow *w, int mask, const WindowPaintData &data) const;
     void updateContrastRegion(EffectWindow *w) const;
-    void doContrast(const QRegion &shape, const QRect &screen, const float opacity);
+    void doContrast(const QRegion &shape, const QRect &screen, const float opacity, const QMatrix4x4 &screenProjection);
     void uploadRegion(QVector2D *&map, const QRegion &region);
     void uploadGeometry(GLVertexBuffer *vbo, const QRegion &region);
 
diff --git a/effects/blur/blur.cpp b/effects/blur/blur.cpp
index 95debe435f..ea68fcba3b 100644
--- a/effects/blur/blur.cpp
+++ b/effects/blur/blur.cpp
@@ -434,7 +434,7 @@ bool BlurEffect::shouldBlur(const EffectWindow *w, int mask, const WindowPaintDa
 
 void BlurEffect::drawWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
 {
-    const QRect screen = effects->virtualScreenGeometry();
+    const QRect screen = GLRenderTarget::virtualScreenGeometry();
     if (shouldBlur(w, mask, data)) {
         QRegion shape = region & blurRegion(w).translated(w->pos()) & screen;
 
@@ -529,7 +529,8 @@ void BlurEffect::doBlur(const QRegion& shape, const QRect& screen, const float o
     scratch.setWrapMode(GL_CLAMP_TO_EDGE);
     scratch.bind();
 
-    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r.x(), effects->virtualScreenSize().height() - r.y() - r.height(),
+    const QRect sg = GLRenderTarget::virtualScreenGeometry();
+    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r.x() - sg.x(), sg.height() - sg.y() - r.y() - r.height(),
                         r.width(), r.height());
 
     // Draw the texture on the offscreen framebuffer object, while blurring it horizontally